Roundest natural object
- Who
- Kepler 11145123
- What
- 3 kilometre(s)
- Where
- Not Applicable
- When
- 16 November 2016
On 16 November 2016, an international team of astronomers announced their discovery of the most spherical natural object yet measured in the universe. Kepler 11145123 is an A-type star around 5,000 light years away. Over a period of 51 months, the team observed the star’s natural oscillations and used asteroseismology to measure the star’s size. They discovered that the star, which has a mean radius of 1.5 million km, has polar and equatorial radii that differ by only 3 km. Kepler 11145123 rotates once every 100 days.